六种泥炭藓形态结构特征对其持水能力的影响  

Effects of morphological and structural characteristics of six species of Sphagnum on their water-holding capacity

作　　者：穆艳艳 吴启美 张朝晖[1] 丁海峰 Mu Yan-Yan;Wu Qi-Mei;Zhang Zhao-Hui;Ding Hai-Feng(Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environmental of Guizhou Province,Guizhou Normal University,Guiyang 550001,China)

机构地区：[1]贵州师范大学,贵州省山地环境信息系统与生态环境保护重点实验室,贵阳550001

出　　处：《植物科学学报》2022年第2期250-258,共9页Plant Science Journal

基　　金：贵州科技厅基金项目,黔科合平台人才[2019];贵州省黔科合基础([2017]1127)。

摘　　要：本研究选取贵州都匀市毛尖镇螺蛳壳风景区沼泽湿地的6种泥炭藓属(Sphagnum)植物,分别测量其主茎粗、株高,计数侧枝数和分枝数,并计算其饱和吸水率、外吸水率、内吸水率、透明细胞面积占比、侧枝密度等指标。结果显示:(1)6种泥炭藓饱和吸水率大小依次为狭叶泥炭藓(S.cuspidatum Ehrh)(2518.99%)>泥炭藓密枝亚种(S.palustre L.ssp.pseudocymbifolium(C.Müll.)A.Eddy)(2351.87%)>泥炭藓原亚种(S.palustre L.ssp.palustre)(2122.88%)>小孔泥炭藓(S.microporum Warnst.ex Card)(1936.79%)>拟宽叶泥炭藓(S.platyphylloides Warnst)(1684.88%)>卵叶泥炭藓(S.ovatum Hampe)(1660.64%);(2)6种泥炭藓的内吸水率均高于外吸水率;(3)透明细胞面积占比与吸水率(饱和、内、外)呈极显著正相关(P<0.01);侧枝密度与内吸水率呈极显著正相关(P<0.01),与饱和吸水率呈显著正相关(P<0.05)。本文所测指标中,透明细胞面积占比和侧枝密度对泥炭藓持水能力的影响最大。In this study,six Sphagnum species were collected from the wetlands of the Screw Shell Mountain Scenic Spot in Maojian Town,Duyun City,Guizhou,China to measure stem diameter,plant height,number of lateral branches and branches,saturated water absorption rate,external water absorption rate,internal water absorption rate,leaf hyaline cell area,and lateral branch density.Results showed that:(1)Saturated water absorption rates of the six species were:S.cuspidatum Ehrh(2518.99%)>S.palustre L.ssp.pseudocymbifolium(C.Müll.)A.Eddy(2351.87%)>S.palustre L.ssp.Palustre(2122.88%)>S.microporum Warnst.ex Card(1936.79%)>S.platyphylloides Warnst(1684.88%)>S.ovatum Hampe(1660.64%).(2)Internal water absorption was higher than external water absorption in all species.(3)Leaf hyaline cell area percentage was positively correlated with water absorption(saturated,external,and internal)(P<0.01).Lateral branch density was positively correlated with internal water absorption(P<0.01)and saturated water absorption(P<0.05).Among the indicators measured,leaf hyaline cell area percentage and lateral branch density had the greatest influence on the water-holding capacity of Sphagnum.

关 键 词：泥炭藓 吸水差异性 透明细胞 侧枝密度 水分保持 

分 类 号：Q949.352.1[生物学—植物学]